Z. Kun
2011
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Journal
Special Purpose Rubber Products
Abstract
The effects of 4,4′-Dithiodimorpholine(DTDM),N,N′-1,3-Phenylene bismaleimide(HVA-2),magnesium dimethacrylate[Mg(MMA)2]/sulfur curing system or magnesium dimethacrylate [Mg(MMA)2]/dicumyl peroxide(DCP)curing system on mechanical properties of EPDM vulcanizate were investigated.The results showed that the elongation at break and compression set of EPDM vulcanizate cured with DTDM/HVA-2/S curing system were lower than those of EPDM vulcanizate cured with pure sulfur curing system,while the tensile strength,the modulus and the hardness were all higher than the later,and the aging resistance was better than the later,too.Magnesium dimethacrylate [Mg(MMA)2] could remarkably increase the cross-link density,tensile strength,modulus and elongation at break of EPDM vulcanizate cured with sulfur curing system or with DCP curing system.Silica modified with Si69 and paraffin oil could remarkably increase the most of mechanical properties of Mg(MAA)2/carbon black/EPDM vulcanizate,while both the modulus and the hardness maintained low level,the aging resistance was modified.